JP2017080396A - Medical image diagnostic assistance device, controlling method and program for the same - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a system for informing a user of a position in which a large amount of lesioned parts exist in a while lung field.SOLUTION: A medical image data is specified and a lung field area and a pulmonary emphysema area in a plurality of tomographic images are extracted. A system is provided in which a ratio of the pulmonary emphysema area in the tomographic image is calculated and can display by correlating the image of the medical image data and the value showing the calculated ratio. With this configuration, an image is provided in which a user can recognize a region in the lung field area in which large amounts of pulmonary emphysema exist.SELECTED DRAWING: Figure 4

Description

  The present invention relates to a medical image diagnosis support apparatus, a control method thereof, and a program.

  Emphysema is a type of obstructive pulmonary disease that shows a pathological condition in which the aerated region expands after the destruction of alveoli, mainly caused by tobacco, has progressed. It is increasing.

  A test method for examining exhaled breathing ability called spirometry is mainly used as a test or diagnosis method for emphysema. Although this test is a method of measuring the actual exhalation / inhalation volume, it can be a painful test in patients with severe emphysema due to a decrease in respiratory capacity.

  Therefore, in recent years, a quantitative measurement method using medical image data (hereinafter also referred to as a CT image) taken by an X-ray CT (Computed Tomography) apparatus has been proposed. Among them, a technique for scoring the degree of progression of pulmonary emphysema called “Goddard method” is simple and widely used (Non-patent Document 1). Therefore, analysis software that enables evaluation according to the Godard method is desired.

Japan Respiratory Society: Guidelines for Diagnosis and Treatment of COPD (Chronic Obstructive Pulmonary Disease) Second Edition, Medical Review, Inc., 2004

  In the evaluation method according to the Godard method, using the three sections of the upper lung field (near the aortic arch), the middle lung field (position of the bronchial bifurcation), and the lower lung field (position 1 to 3 cm above the diaphragm), LAA (Low Attenuation Area) in the left and right lung fields is an area that has a CT value that is clearly lower than the normal lung field area on the CT image. Usually, the area where the CT value is -950HU or less is the LAA area. The percentage of the area is said to be scored, and the severity of chronic obstructive pulmonary disease is judged based on the total.

  However, the measurement at the six left and right positions described above does not capture the entire state of the lung, which is a longitudinally long organ. Therefore, in addition to the score evaluation at the six positions, how the pathology progresses in the body axis direction. Preferably, it can be presented to the diagnostician by a mechanism that allows visual and intuitive judgment.

  SUMMARY OF THE INVENTION An object of the present invention is to provide a mechanism that allows a user to know a position where many lesions exist in the entire lung field.

  In order to achieve the above object, a medical image diagnosis support apparatus of the present invention includes an acquisition unit that acquires medical image data of a subject, and lungs in a plurality of tomographic images of the medical image data acquired by the acquisition unit. A first extracting means for extracting a field area for each tomographic image; a second extracting means for extracting an emphysema area in the tomographic image extracted by the extracting means; and a ratio of the emphysema area in the lung field area For each tomographic image, a value indicating the ratio of the emphysema area calculated by the calculating unit, and a position of the tomographic image corresponding to the value can be identified on the display unit. Display control means for controlling to display an image of image data and a value indicating the ratio of the emphysema area is provided.

  ADVANTAGE OF THE INVENTION According to this invention, the mechanism which can let a user know the position where many lesion parts exist in the whole lung field can be provided. As a result, the diagnostician can read information that cannot be read only by the value calculated by the Goddard method, and can assist diagnosis.

It is a figure explaining an example of the hardware constitutions of the medical image diagnosis assistance apparatus 100 in embodiment of this invention. It is a figure explaining an example of a functional structure of the medical image diagnosis assistance apparatus 100 in embodiment of this invention. It is an example of the flowchart explaining the flow of the process in embodiment of this invention. It is an example of the screen in which the image and graph of medical image data are displayed in parallel in the embodiment of the present invention. It is an example of the screen in which the image of medical image data and the graph of each of the right lung and the left lung are displayed in parallel in the second embodiment of the present invention. It is an example of the screen in which the graph by which the display size was changed with the change of the display size of the image of medical image data in the embodiment of the present invention was displayed in parallel. In the embodiment of the present invention, the display position of the graph is changed as the image of the medical image data is moved, and the screen is displayed in parallel with the image of the medical image data. It is the example of a screen in which the image of medical image data and the graph of each of right lung and left lung are displayed as the same graph in the 3rd Embodiment of this invention.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings.

  First, the hardware configuration of the medical image diagnosis support apparatus 100 according to the embodiment of the present invention will be described with reference to FIG. Note that the hardware configuration of the medical image diagnosis support apparatus 100 in FIG. 1 is merely an example, and there are various configuration examples depending on applications and purposes.

  The medical image diagnosis support apparatus 100 includes a CPU 201, RAM 202, ROM 203, system bus 204, input controller 205, video controller 206, memory controller 207, communication I / F controller 208, input device 209, display 210, external memory 211, and the like. .

  The CPU 201 comprehensively controls each device and controller connected to the system bus 204.

  The RAM 202 functions as a main memory, work area, and the like for the CPU 201. The CPU 201 implements various operations by loading a program necessary for execution of processing into the RAM 202 and executing the program.

  The ROM 203 or the external memory 211 stores a BIOS (Basic Input / Output System) that is a control program of the CPU 201, an operating system, and various programs described below that are necessary for realizing functions executed by various devices.

  The input controller 205 controls input from a pointing device (input device 209) such as a keyboard and a mouse.

  The video controller 206 controls display on a display device such as the display 210. The display 210 (display unit) is, for example, a CRT or a liquid crystal display.

  The memory controller 207 is an external memory such as a hard disk or a flexible disk that stores a boot program, browser software, various applications, font data, user files, various data, etc., or a card-type memory connected to a PCMCIA card slot via an adapter. Controls access to 211.

  Note that the CPU 201 enables display on the display 210 by executing outline font rasterization processing on a display information area in the RAM 202, for example. Further, the CPU 201 enables a user instruction with a mouse cursor (not shown) on the display 210.

  Various programs used by the medical image diagnosis support apparatus 100 of the present invention to execute various processes to be described later are stored in the external memory 211, and are loaded into the RAM 202 as necessary to be executed by the CPU 201. It is what is done. Furthermore, definition files, various information tables, medical images, and the like used by the program according to the present invention are stored in the external memory 211. The medical image may be stored in an external server or the like, and the medical image diagnosis support apparatus 100 may acquire the medical image from the external server.

  This is the end of the description of the hardware configuration of the medical image diagnosis support apparatus 100 illustrated in FIG.

  Next, description of the functional configuration diagram of the medical image diagnosis support apparatus 100 will be started with reference to FIG.

  The medical image diagnosis support apparatus 100 includes an image acquisition unit 1001, a lung field region extraction unit 1002, an pulmonary emphysema region extraction unit 1003, a calculation unit 1004, a graph generation unit 1005, and a display control unit 1006 as functional units. The image acquisition unit 1001 acquires medical image data such as a CT image of a subject obtained by imaging with a modality, for example. The lung field region extraction unit 1002 extracts the lung field region of the subject based on the medical image data acquired by the image acquisition unit 1001. The emphysema region extraction unit 1003 extracts the emphysema region of the subject based on the medical image data acquired by the image acquisition unit 1001. The calculation unit 1004 calculates the ratio of the emphysema area in the extracted lung field area for each medical image data. The graph generation unit 1005 generates a graph indicating the ratio of the emphysema area in the lung field calculated by the calculation unit 1004 and the position of the subject in the medical image data corresponding to the ratio. The display control unit 1006 displays the subject image and the graph generated by the graph generation unit 1005 on the display screen.

  The description of the functional configuration of the medical image diagnosis support apparatus 100 shown in FIG.

  Next, details of the processing in the embodiment of the present invention will be described using the flowchart shown in FIG.

[First Embodiment]
In step S301, the CPU 201 of the medical image diagnosis support apparatus 100 acquires a CT image group that is a slice image (tomographic image) captured by, for example, an X-ray CT (Computed Tomography) apparatus. In the medical field, an image captured by such a modality device is generally transmitted to a PACS (Picture Archiving Communication System) connected via a network and is centrally managed there. Therefore, the medical image diagnosis support apparatus 100 is provided so that images can be acquired not only from the medical image diagnosis support apparatus but also from the PACS. Note that the CPU 201 of the medical image diagnosis support apparatus 100 may be not only a slice image but also a re-slice image obtained by reslicing a three-dimensional image composed of a plurality of slice images.

  In step S302, the CPU 201 of the medical image diagnosis support apparatus 100 replaces the CT value of the background portion that is not the human body region of the acquired slice image with a CT value larger than the CT value corresponding to the lung field region. This is to prevent accidental extraction during the subsequent extraction of the emphysema region, and specifically, it is replaced with -700HU.

  Thereafter, a lung field region is extracted for each CT image by specifying a pixel having a CT value smaller than a predetermined threshold value (for example, CT value: −400 HU) for extracting the lung field region. Note that the lung field region extraction method is not limited to this, and if the lung field region can be specified, the user may accept the designation of the lung field region, which is described in JP-A-2003-70781. Any method such as a method may be used.

  In step S303, the CPU 201 of the medical image diagnosis support apparatus 100 extracts an emphysema region for each slice image acquired in step S301. Emphysema lesions are extracted as LAA (low attenuation area) in slice images. More specifically, the emphysema region is extracted by specifying pixels having CT values smaller than a known value corresponding to emphysema (for example, CT value: -900HU). Such an emphysema region extraction method is not limited to this, and the emphysema region may be extracted by using another method such as the method described in JP-A-2003-70781.

  In step S304, the CPU 201 of the medical image diagnosis support apparatus 100 calculates the ratio of the emphysema area extracted in step S303 to the lung field area extracted in step S302 for each slice image. More specifically, M is the number of pixels in the lung field region, N is the number of pixels in the emphysema region, and the ratio is obtained by dividing N by M. In this manner, a value indicating the ratio of the emphysema area to the lung field area is calculated for each slice image. The calculated value is managed in association with the slice image.

  In step S305, the CPU 201 of the medical image diagnosis support apparatus 100 generates a graph obtained by plotting the value indicating the ratio for each slice image calculated in step S304. The generated graph is the graph 401 shown in FIG. As indicated by the graph 401 in FIG. 4, the reference values used for the Goddard method score determination are provided with reference lines of 25%, 50%, and 75%, which are reference values of values indicating the percentage of emphysema. . As shown in FIG. 4, the graph line is blue when the emphysema ratio value is in the range of 0% to less than 25%, and the graph line is orange in the range of 25% to less than 50%, and 50% to 75%. The graph color is white within the range of less than 75%, and the graph color is red within the range of 75% to less than 100%. In this way, by changing the display form of the graph step by step according to the value indicating the percentage of emphysema, the user can more clearly recognize where there is more emphysema in the entire lung field of the subject Can be made. As an example of a different display form, color coding has been described as an example, but other forms such as changing the form of the line itself may be used.

  In step S306, the CPU 201 of the medical image diagnosis support apparatus 100 resizes the coronal cross-sectional image created by re-slicing the three-dimensional image composed of the slice image group acquired in step S301, and the graph generated in step S305. , Display in parallel. For example, it is a screen example shown in FIG. Thus, by displaying the coronal cross-sectional image 402 and the graph 401 in parallel, the user can easily compare the value indicating the percentage of emphysema and the position of the subject corresponding to this value. In other words, the distribution of the emphysema that allows the user to identify which part of the subject corresponds to the portion where the percentage of emphysema is high in the graph, and is not known only by the score calculated based on the Godard method The state can be recognized at a glance.

  In step S307, the CPU 201 of the medical image diagnosis support apparatus 100 determines whether or not a selection operation (for example, click with the mouse) by the input device 209 by the user is accepted in the graph 401 displayed in step S306. If it is determined that the selection operation has been accepted, the process proceeds to step S308; otherwise, the process proceeds to step S310.

  In step S308, the CPU 201 of the medical image diagnosis support apparatus 100 identifies the position on the graph that has received the selection operation in step S307, and identifies a slice image corresponding to a value indicating the ratio of the identified position.

  In step S309, the CPU 201 of the medical image diagnosis support apparatus 100 displays the slice image specified in step S308 in the display area 403. In this way, when the user wants to refer to the slice image corresponding to the value on the graph 401, the slice image can be easily displayed on the display screen. After the slice image is displayed in the display area 403, the process returns to step S307.

  In step S310, the CPU 201 of the medical image diagnosis support apparatus 100 receives a coronal sectional image enlargement instruction (display magnification) instruction (corresponding to display magnification reception means) and a display position movement instruction (display position) from the user. It is determined whether or not. If an enlargement / reduction instruction or an instruction to move the display position is received, the process proceeds to step S311; otherwise, the process proceeds to step S312.

  In step S311, the CPU 201 of the medical image diagnosis support apparatus 100 changes or displays the display size of the coronal slice image according to the user instruction (corresponding to the display position receiving unit) received in step S310. Change the position. In step S311, the size and display of the graph indicating the ratio of emphysema are displayed while maintaining (synchronized) the display size and display position (correspondence) of the coronal slice image changed by the user's instruction. Change the position.

  For example, a screen example shown in FIG. 6 will be described. FIG. 6 is an example of a screen in which the size of the coronal cross-sectional image shown in FIG. 4 is changed. Based on the user's instruction, the display size of the coronal slice image 602 is reduced. In accordance with the scale of the coronal cross-sectional image 602, the display size of the graph 601 is displayed small while maintaining the positional relationship between the coronal cross-sectional image 602 and the graph 601. In the present embodiment, the coronal cross-sectional image is displayed in a reduced size, but naturally it may be displayed in an enlarged manner.

  FIG. 7 is an example of a screen in which the position of the coronal slice image shown in FIG. 4 is moved. The display position of the graph 701 is changed in accordance with the movement of the coronal sectional image 702 while maintaining the positional relationship between the coronal sectional image 702 and the graph 701.

  In this way, the display size and position of the coronal cross-sectional image can be changed, and the display size and position can be changed in conjunction with the graph, so that the user can distribute the emphysema distribution throughout the lungs. It is possible to easily see which part of the lung has a lot of emphysema in detail. In the present embodiment, an example in which the user specifies a coronal cross-sectional image and the display size and position are changed is shown. However, the change in the display size and position of the graph is accepted, and the coronal is corresponding to the change. You may make it change the display size and position of a cross-sectional image.

  In step S312, the CPU 201 of the medical image diagnosis support apparatus 100 receives whether a display end instruction has been received from the user. If it is determined that an end instruction has been accepted, the display process is terminated; otherwise, the process returns to step S307.

  This is the end of the description of the flowchart shown in FIG.

[Second Embodiment]
In the first embodiment, a graph is generated by obtaining a value indicating the ratio of the emphysema region to the entire lung field region without dividing the lung field region of the slice image into the right lung and the left lung. In the second embodiment, a lung field region is divided into a left lung field region and a right lung field region, and a graph is provided with values indicating the ratios of the pulmonary emphysema regions (right pulmonary emphysema region and left pulmonary emphysema region) in each region. To do.
In the second embodiment, the system configuration, hardware configuration, functional configuration, screen example, data table, and the like are the same as those in the first embodiment except for the following changes. As a changed point, FIG. 4 is changed to FIG. Description of the same parts as those in the first embodiment will be omitted, and only parts different from those in the first embodiment will be described.

  Only the parts different from those of the first embodiment will be described using the flowchart of FIG. For a flow not described, the same processing as in the first embodiment is performed.

  In step S302, the CPU 201 of the medical image diagnosis support apparatus 100 replaces the CT value of the background portion that is not the human body region of the acquired slice image with a CT value larger than the CT value corresponding to the lung field region. This is to prevent accidental extraction at the time of subsequent emphysema area extraction, and specifically replaces it with 800 HU.

  Thereafter, a lung field region is extracted for each slice image by specifying a pixel having a CT value smaller than a predetermined threshold value (for example, CT value: −400 HU) for extracting the lung field region. The extracted lung field regions are two regions as indicated by reference numeral 503 in FIG. Each region can be stored as a right lung field region and a left lung field region by accepting designation by selecting with the mouse from the user, etc., and the right lung field region and the left lung field region can be identified by a known method May be.

  In step S303, the CPU 201 of the medical image diagnosis support apparatus 100 extracts the left pulmonary emphysema region in the left lung field region and the right pulmonary emphysema region extracted in step S302, respectively. The method for extracting the emphysema area is the same as that in the first embodiment. By executing the emphysema area extraction method within the area extracted in step S302, the left lung field area, the right lung field area, and the respective emphysema areas are extracted.

  In step S304, the CPU 201 of the medical image diagnosis support apparatus 100 calculates the ratio of the emphysema region to each of the right lung field region and the left lung field region extracted in step S303.

  In step S305, the CPU 201 of the medical image diagnosis support apparatus 100 generates a value graph 501 indicating the ratio of the emphysema area to the right lung field area and a value graph 502 indicating the ratio of the emphysema area to the left lung field area. . For example, a graph 501 and a graph 502 shown in FIG.

In step S306, the CPU 201 of the medical image diagnosis support apparatus 100 displays the graph generated in step S305 at a corresponding position on the coronal slice image. More specifically, a graph 501 of a value indicating the ratio of the emphysema area to the right lung field area is displayed on the right lung field area side of the coronal cross-sectional image 504, and a graph of a value indicating the ratio of the emphysema area to the left lung field area 502 is displayed on the left lung field side of the coronal sectional image 504. By doing in this way, there exists an effect which makes it possible to make a user recognize the progress state of each emphysema by the right lung field area | region and the left lung field area | region of the coronal slice image 504.
This is the end of the description of the second embodiment.

[Third Embodiment]
Next, a third embodiment of the present invention will be described. Differences from the second embodiment will be described. In the second embodiment, the lung field region is divided into a left lung field region and a right lung field region, and graphs of values indicating the ratios of the pulmonary emphysema regions (right pulmonary emphysema region and left pulmonary emphysema region) in each region are generated. , Was displayed separately. In 3rd Embodiment, the graph of the value which shows the ratio of the emphysema area | region in each area | region is displayed as the same graph on the same area | region. In the third embodiment, the system configuration, hardware configuration, functional configuration, screen example, data table, and the like are the same as those in the second embodiment except for the following points. The change is that FIG. 5 is changed to FIG. Description of parts that are the same as those in the second embodiment is omitted, and only parts that are different from those in the second embodiment are described.

The detailed processing flow of the third embodiment will be described with reference to the flowchart of FIG.
Since the processing from step S301 to step S304 is the same as that of the second embodiment, description thereof is omitted.

  In step S305, the CPU 201 of the medical image diagnosis support apparatus 100 generates a value graph 501 indicating the ratio of the emphysema area to the right lung field area and a value graph 502 indicating the ratio of the emphysema area to the left lung field area. . For example, a graph 501 and a graph 502 shown in FIG. The graph 502 is a graph that can be distinguished from the graph 501. In the present embodiment, the graph 501 is displayed in a solid line display, while the graph 502 is displayed in a dotted line, whereby each graph can be identified. You may make it display with identification, for example by dividing by the graph.

  In step S306, the CPU 201 of the medical image diagnosis support apparatus 100 displays the graph generated in step S305 at a corresponding position in the coronal slice image. The graph 501 and the graph 502 are displayed in the same area. This will be described more specifically with reference to FIG.

FIG. 8 shows a graph 501 that is a value indicating the ratio of the emphysema area to the right lung field area and a graph 502 that is a value graph indicating the ratio of the emphysema area to the left lung field area in the same area. FIG. Thus, by displaying the graph 501 indicating the ratio of the emphysema area to the right lung field area and the graph 502 indicating the ratio of the emphysema area to the left lung field area in the same area, the right lung field area and There is an effect of easily comparing the progress of emphysema with the left lung field region. That is, it is possible to grasp sensuously whether the disease state is worsening in either the left or right lung.
This is the end of the description of the third embodiment.

  According to an embodiment of the present invention, it is possible to make it possible to understand at a glance the distribution state of emphysema (LAA) as seen from the entire lung field, which is not known from the score based on the Godard method, and to the user. The degree of progression of the symptom of the specimen can be recognized.

  In the embodiment of the present invention, the values obtained by calculating the ratio of the pulmonary emphysema area in the lung field area are graphed for all slice images constituting the volume data imaged by the CT apparatus of the subject, and the object is graphed. Although it is displayed in parallel with the sample image, it is not necessary to perform it on all the slice images that make up the volume data, for example, the value obtained by calculating the ratio of the emphysema area in the lung field area of every few slice images May be graphed and displayed in parallel with the image of the subject.

  The present invention can be implemented as a system, apparatus, method, program, storage medium, or the like, and can be applied to a system including a plurality of devices. You may apply to the apparatus which consists of one apparatus. Note that the present invention includes a software program that implements the functions of the above-described embodiments directly or remotely from a system or apparatus. The present invention also includes a case where the information processing apparatus of the system or apparatus is achieved by reading and executing the supplied program code.

  Therefore, the program code itself installed in the information processing apparatus in order to realize the functional processing of the present invention with the information processing apparatus also realizes the present invention. That is, the present invention also includes a computer program for realizing the functional processing of the present invention.

  In that case, as long as it has the function of a program, it may be in the form of object code, a program executed by an interpreter, script data supplied to the OS, and the like.

  Examples of the recording medium for supplying the program include a flexible disk, hard disk, optical disk, magneto-optical disk, MO, CD-ROM, CD-R, and CD-RW. In addition, there are magnetic tape, nonvolatile memory card, ROM, DVD (DVD-ROM, DVD-R), and the like.

  As another program supply method, a browser on a client computer is used to connect to an Internet home page. The computer program itself of the present invention or a compressed file including an automatic installation function can be downloaded from the homepage by downloading it to a recording medium such as a hard disk.

  It can also be realized by dividing the program code constituting the program of the present invention into a plurality of files and downloading each file from a different homepage. That is, the present invention also includes a WWW server that allows a plurality of users to download a program file for realizing the functional processing of the present invention with an information processing apparatus.

  In addition, the program of the present invention is encrypted, stored in a storage medium such as a CD-ROM, distributed to users, and key information for decryption is downloaded from a homepage via the Internet to users who have cleared predetermined conditions. Let me. The downloaded key information can be used to execute the encrypted program and install it in the information processing apparatus.

  Further, the functions of the above-described embodiment are realized by the information processing apparatus executing the read program. In addition, based on the instructions of the program, the OS or the like operating on the information processing apparatus performs part or all of the actual processing, and the functions of the above-described embodiments can be realized by the processing.

  Further, the program read from the recording medium is written in a memory provided in a function expansion board inserted into the information processing apparatus or a function expansion unit connected to the information processing apparatus. Thereafter, the CPU of the function expansion board or function expansion unit performs part or all of the actual processing based on the instructions of the program, and the functions of the above-described embodiments are realized by the processing.

  The above-described embodiments are merely examples of implementation in carrying out the present invention, and the technical scope of the present invention should not be construed as being limited thereto. That is, the present invention can be implemented in various forms without departing from the technical idea or the main features thereof.

100 Medical Image Diagnosis Support Device 201 CPU
202 RAM
203 ROM
204 System Bus 205 Input Controller 206 Video Controller 207 Memory Controller 208 Communication I / F Controller 209 Keyboard 210 CRT Display 211 External Memory

Claims (11)

Acquisition means for acquiring medical image data of a subject;
First extraction means for extracting, for each tomographic image, lung field regions in a plurality of tomographic images of the medical image data acquired by the acquiring means;
Second extraction means for extracting an emphysema area in the tomographic image extracted by the extraction means;
A calculation means for calculating a ratio of the emphysema area in the lung field area for each tomographic image;
A value indicating the ratio of the image of the medical image data and the ratio of the emphysema area on the display unit so that the value indicating the ratio of the emphysema area calculated by the calculation means and the position of the tomographic image corresponding to the value can be identified. And a display control means for controlling to display the medical image diagnosis support apparatus.   2. The medical image according to claim 1, wherein the display control unit performs control so as to display a value indicating the ratio of the emphysema area as a graph created using a value indicating the ratio of the emphysema area. Diagnosis support device.   The medical image diagnosis support apparatus according to claim 2, wherein the display control unit controls the graph so that a display form is changed according to a value indicating a ratio of the emphysema.   The medical image diagnosis support apparatus according to claim 1, wherein the image of the medical image data displayed on the display unit is a coronal cross-sectional image.   The control unit displays the value indicating the ratio of the emphysema area and the position of the tomographic image corresponding to the value in parallel so as to be identifiable by the display unit. 5. The medical image diagnosis support apparatus according to any one of 4 above. The first extraction means and the second extraction means separately extract a left lung field and a right lung field of the subject,
The calculating means includes a ratio of the left pulmonary emphysema area in the left lung field extracted by the first extracting means and a ratio of the right pulmonary emphysema area in the right lung field extracted by the first extracting means, respectively. Calculate
The said display control means controls the value which shows the ratio of the said emphysema area | region so that the said left lung field area | region and the said right lung field area | region may be displayed separately. The medical image diagnosis support apparatus according to Item 1. The first extraction means and the second extraction means respectively extract a left lung field and a right lung field of the subject,
The calculating means calculates a ratio of the left pulmonary emphysema area in the left lung field extracted by the first extracting means and a ratio of the right pulmonary emphysema area in the right lung field extracted by the first extracting means. Respectively,
The display control means controls to display the ratio of the emphysema area of the left lung field area and the ratio of the emphysema area of the right lung field area on the same graph. The medical image diagnosis support apparatus according to any one of the above. A display position receiving means for receiving a change in the display position of the image of the medical image data displayed on the display unit;
The display control means changes the display position of the image of the medical image data so as to correspond to the display position received by the display position reception means, and the position for displaying the ratio is also different from the image of the medical image data. The medical image diagnosis support apparatus according to any one of claims 1 to 6, wherein display control is performed such that the correspondence relationship is changed so as to be maintained. A display magnification receiving means for receiving a change in display magnification of the image of the medical image data displayed on the display unit;
The display control means changes the display magnification of the image of the medical image data so as to be the display magnification received by the reception means, and the position at which the ratio is displayed also corresponds to the image of the medical image data. The medical image diagnosis support apparatus according to any one of claims 1 to 7, wherein display control is performed such that the display is changed so as to be maintained. The medical image diagnosis support device
An acquisition step of acquiring medical image data of the subject;
A first extraction step of extracting, for each tomographic image, lung field regions in a plurality of tomographic images of the medical image data acquired in the acquiring step;
A second extraction step of extracting an emphysema region in the tomographic image extracted in the extraction step;
A calculation step for calculating a ratio of the emphysema region in the lung field region for each tomographic image;
A value indicating the ratio of the image of the medical image data and the ratio of the emphysema area on the display unit so that the value indicating the ratio of the emphysema area calculated in the calculation step and the position of the tomographic image corresponding to the value can be identified. And a display control step for controlling to display the medical image diagnosis support apparatus. Medical image diagnosis support device
Acquisition means for acquiring medical image data of a subject;
First extraction means for extracting, for each tomographic image, lung field regions in a plurality of tomographic images of the medical image data obtained by the obtaining means;
Second extraction means for extracting an emphysema area in the tomographic image extracted by the extraction means;
A calculation means for calculating a ratio of the emphysema area in the lung field area for each tomographic image;
A value indicating the ratio of the image of the medical image data and the ratio of the emphysema area on the display unit so that the value indicating the ratio of the emphysema area calculated by the calculation means and the position of the tomographic image corresponding to the value can be identified. A program that functions as a display control unit that controls to display.

Images